Hi Stefan, You should also put Jagan Teki as recipients.
On Wed, Sep 27, 2017 at 07:19:10AM +0000, Stefan Mavrodiev wrote:
> From revision J the board uses new phy chip LAN8710. Compared
> with RTL8201, RA17 pin is TXERR. It has pullup which causes phy
> not to work. To fix this PA17 is muxed with GMAC function. This
> makes the pin output-low.
>
> Signed-off-by: Stefan Mavrodiev <ste...@olimex.com>
> ---
> arch/arm/dts/sun7i-a20-olinuxino-micro.dts | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/dts/sun7i-a20-olinuxino-micro.dts
> b/arch/arm/dts/sun7i-a20-olinuxino-micro.dts
> index 7e3006f..0bc5ea9 100644
> --- a/arch/arm/dts/sun7i-a20-olinuxino-micro.dts
> +++ b/arch/arm/dts/sun7i-a20-olinuxino-micro.dts
> @@ -95,7 +95,7 @@
>
> &gmac {
> pinctrl-names = "default";
> - pinctrl-0 = <&gmac_pins_mii_a>;
> + pinctrl-0 = <&gmac_pins_mii_a>,<&gmac_txerr>;
> phy = <&phy1>;
> phy-mode = "mii";
> status = "okay";
> @@ -226,6 +226,13 @@
> };
>
> &pio {
> + gmac_txerr: gmac_txerr@0 {
> + allwinner,pins = "PA17";
> + allwinner,function = "gpio_out";
> + allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> + allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> + };
> +
There's two issues with that patch:
- In general we try to sync the DT with Linux when we can, and the
patch that ended up in Linux wasn't this one.
- And we don't have any pinctrl support in U-Boot, that patch will
basically do nothing
The code that changes the muxing is here:
http://git.denx.de/?p=u-boot.git;a=blob;f=board/sunxi/gmac.c#l34
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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